arch/mips/pnx8550/common/prom.c

   1 /*
   2  *
   3  * Per Hallsmark, per.hallsmark@mvista.com
   4  *
   5  * Based on jmr3927/common/prom.c
   6  *
   7  * 2004 (c) MontaVista Software, Inc. This file is licensed under the
   8  * terms of the GNU General Public License version 2. This program is
   9  * licensed "as is" without any warranty of any kind, whether express
  10  * or implied.
  11  */
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/string.h>
  16 #include <linux/serial_pnx8xxx.h>
  17
  18 #include <asm/bootinfo.h>
  19 #include <uart.h>
  20
  21 /* #define DEBUG_CMDLINE */
  22
  23 extern int prom_argc;
  24 extern char **prom_argv, **prom_envp;
  25
  26 typedef struct
  27 {
  28     char *name;
  29 /*    char *val; */
  30 }t_env_var;
  31
  32
  33 char * prom_getcmdline(void)
  34 {
  35         return &(arcs_cmdline[0]);
  36 }
  37
  38 void __init prom_init_cmdline(void)
  39 {
  40         int i;
  41
  42         arcs_cmdline[0] = '\0';
  43         for (i = 0; i < prom_argc; i++) {
  44                 strcat(arcs_cmdline, prom_argv[i]);
  45                 strcat(arcs_cmdline, " ");
  46         }
  47 }
  48
  49 char *prom_getenv(char *envname)
  50 {
  51         /*
  52          * Return a pointer to the given environment variable.
  53          * Environment variables are stored in the form of "memsize=64".
  54          */
  55
  56         t_env_var *env = (t_env_var *)prom_envp;
  57         int i;
  58
  59         i = strlen(envname);
  60
  61         while(env->name) {
  62                 if(strncmp(envname, env->name, i) == 0) {
  63                         return(env->name + strlen(envname) + 1);
  64                 }
  65                 env++;
  66         }
  67         return(NULL);
  68 }
  69
  70 inline unsigned char str2hexnum(unsigned char c)
  71 {
  72         if(c >= '0' && c <= '9')
  73                 return c - '0';
  74         if(c >= 'a' && c <= 'f')
  75                 return c - 'a' + 10;
  76         if(c >= 'A' && c <= 'F')
  77                 return c - 'A' + 10;
  78         return 0; /* foo */
  79 }
  80
  81 inline void str2eaddr(unsigned char *ea, unsigned char *str)
  82 {
  83         int i;
  84
  85         for(i = 0; i < 6; i++) {
  86                 unsigned char num;
  87
  88                 if((*str == '.') || (*str == ':'))
  89                         str++;
  90                 num = str2hexnum(*str++) << 4;
  91                 num |= (str2hexnum(*str++));
  92                 ea[i] = num;
  93         }
  94 }
  95
  96 int get_ethernet_addr(char *ethernet_addr)
  97 {
  98         char *ethaddr_str;
  99
 100         ethaddr_str = prom_getenv("ethaddr");
 101         if (!ethaddr_str) {
 102                 printk("ethaddr not set in boot prom\n");
 103                 return -1;
 104         }
 105         str2eaddr(ethernet_addr, ethaddr_str);
 106         return 0;
 107 }
 108
 109 void __init prom_free_prom_memory(void)
 110 {
 111 }
 112
 113 extern int pnx8550_console_port;
 114
 115 /* used by early printk */
 116 void prom_putchar(char c)
 117 {
 118         if (pnx8550_console_port != -1) {
 119                 /* Wait until FIFO not full */
 120                 while( ((ip3106_fifo(UART_BASE, pnx8550_console_port) & PNX8XXX_UART_FIFO_TXFIFO) >> 16) >= 16)
 121                         ;
 122                 /* Send one char */
 123                 ip3106_fifo(UART_BASE, pnx8550_console_port) = c;
 124         }
 125 }
 126
 127 EXPORT_SYMBOL(get_ethernet_addr);
 128 EXPORT_SYMBOL(str2eaddr);